Map array of ints to nested array access

Question

Is there a way to dynamically access a nested array using indices which are themselves stored in an array?

The main array/matrix nesting could be variable e.g. 2, 4,

Answer 1

Ruby 2.3.0 introduced a new method called dig on both Hash and Array that solves this problem.

It returns nil if an element is missing at any level of nesting.

my_array.dig(0,1,1)

Answer 2

[0, 1, 1].inject(my_array, :fetch)
# => 4